DeepSeek

A Hangzhou AI lab that builds large language models and the DeepSeek chatbot, app and API, and releases many of its models for public download.

It was founded on 17 July 2023 as a spin-off from the AGI research group of the Chinese hedge fund High-Flyer, and is led by Liang Wenfeng, who is also its CEO and, per Wikipedia, held about 84% through two holding companies as of May 2024. Its registered name is Hangzhou DeepSeek Artificial Intelligence Basic Technology Research Co., Ltd.

Its best-known releases are DeepSeek-V3 (December 2024) and the reasoning model DeepSeek-R1 (20 January 2025), launched with its chatbot, followed by V3.1 (August 2025), V3.2 (December 2025), a V4 preview (April 2026) and V4.1-Flash (September 2026). It has also drawn disputes: Anthropic accused it in February 2026 of using thousands of fraudulent accounts to generate Claude conversations for training, and the US and Australian governments have restricted its products on official systems.

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www.deepseek.com

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